M.E.DOC 10.00.092
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?????? ?????? ??: Microsoft Windows NT 5.1.2600 Service Pack 3
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Data.StrongTypingException: The value for column 'CERTDATA' in table 'CERTIF' is DBNull. ---> System.InvalidCastException: Unable to cast object of type 'System.DBNull' to type 'System.Byte[]'.
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